/******************************************************************************
* @fn HalUARTOpenISR
*
* @brief Open a port according tp the configuration specified by parameter.
*
* @param config - contains configuration information
*
* @return none
*****************************************************************************/
static void HalUARTOpenISR(halUARTCfg_t *config)
{
isrCfg.uartCB = config->callBackFunc;
// Only supporting subset of baudrate for code size - other is possible.
HAL_UART_ASSERT((config->baudRate == HAL_UART_BR_9600) ||
(config->baudRate == HAL_UART_BR_19200) ||
(config->baudRate == HAL_UART_BR_38400) ||
(config->baudRate == HAL_UART_BR_57600) ||
(config->baudRate == HAL_UART_BR_115200));
if (config->baudRate == HAL_UART_BR_57600 ||
config->baudRate == HAL_UART_BR_115200)
{
UxBAUD = 216;
}
else
{
UxBAUD = 59;
}
switch (config->baudRate)
{
case HAL_UART_BR_9600:
UxGCR = 8;
break;
case HAL_UART_BR_19200:
UxGCR = 9;
break;
case HAL_UART_BR_38400:
case HAL_UART_BR_57600:
UxGCR = 10;
break;
default:
// HAL_UART_BR_115200
UxGCR = 11;
break;
}
// 8 bits/char; no parity; 1 stop bit; stop bit hi.
if (config->flowControl)
{
UxUCR = UCR_FLOW | UCR_STOP;
PxSEL |= HAL_UART_Px_RTS | HAL_UART_Px_CTS;
PxOUT &= ~HAL_UART_Px_RTS;
PxDIR |= HAL_UART_Px_RTS;
}
else
{
UxUCR = UCR_STOP;
}
URXxIE = 1;
UTXxIF = 1; // Prime the ISR pump.
UxCSR = (CSR_MODE | CSR_RE);
}
/******************************************************************************
* @fn HalUARTOpenDMA
*
* @brief Open a port according tp the configuration specified by parameter.
*
* @param config - contains configuration information
*
* @return none
*****************************************************************************/
static void HalUARTOpenDMA(halUARTCfg_t *config)
{
dmaCfg.uartCB = config->callBackFunc;
// Only supporting subset of baudrate for code size - other is possible.
HAL_UART_ASSERT((config->baudRate == HAL_UART_BR_9600) ||
(config->baudRate == HAL_UART_BR_19200) ||
(config->baudRate == HAL_UART_BR_38400) ||
(config->baudRate == HAL_UART_BR_57600) ||
(config->baudRate == HAL_UART_BR_115200));
if (config->baudRate == HAL_UART_BR_57600 ||
config->baudRate == HAL_UART_BR_115200)
{
UxBAUD = 216;
}
else
{
UxBAUD = 59;
}
switch (config->baudRate)
{
case HAL_UART_BR_9600:
UxGCR = 8;
dmaCfg.txTick = 35; // (32768Hz / (9600bps / 10 bits))
// 10 bits include start and stop bits.
break;
case HAL_UART_BR_19200:
UxGCR = 9;
dmaCfg.txTick = 18;
break;
case HAL_UART_BR_38400:
UxGCR = 10;
dmaCfg.txTick = 9;
break;
case HAL_UART_BR_57600:
UxGCR = 10;
dmaCfg.txTick = 6;
break;
default:
// HAL_UART_BR_115200
UxGCR = 11;
dmaCfg.txTick = 3;
break;
}
// 8 bits/char; no parity; 1 stop bit; stop bit hi.
if (config->flowControl)
{
UxUCR = UCR_FLOW | UCR_STOP;
PxSEL |= HAL_UART_Px_CTS;
// DMA Rx is always on (self-resetting). So flow must be controlled by the S/W polling the Rx
// buffer level. Start by allowing flow.
PxOUT &= ~HAL_UART_Px_RTS;
PxDIR |= HAL_UART_Px_RTS;
}
else
{
UxUCR = UCR_STOP;
}
dmaCfg.rxBuf[0] = *(volatile uint8 *)DMA_UDBUF; // Clear the DMA Rx trigger.
HAL_DMA_CLEAR_IRQ(HAL_DMA_CH_RX);
HAL_DMA_ARM_CH(HAL_DMA_CH_RX);
osal_memset(dmaCfg.rxBuf, (DMA_PAD ^ 0xFF), HAL_UART_DMA_RX_MAX*2);
UxCSR |= CSR_RE;
// Initialize that TX DMA is not pending
dmaCfg.txDMAPending = FALSE;
dmaCfg.txShdwValid = FALSE;
}
